A connector capable of electrically connecting two plate-shaped to-be-connected objects in a state arranged on substantially the same plane. Upper contacts are inserted into a housing from rearward, and held thereby. Lower contacts are inserted into the housing from forward, and held thereby. A contact portion of each upper contact is located on a front side of the housing, for contact with an upper surface of a circuit card inserted into a receiving space of the housing. A terminal portion of the upper contact is located on a rear side of the housing, for connection to a motherboard. A contact portion of each lower contact is located on the front side of the housing, for contact with a lower surface of the circuit card inserted into the receiving space of the housing. A terminal portion of the lower contact is located on the rear side of the housing, for connection to the motherboard.